角加速度

Taking the seismic acceleration response and horizontal bent angle as external forces, a simplified seismic calculating method considering train-bridge-earthquake interaction is proposed.

提出了以地震加速度响应和桥梁线路水平折角为外力的分阶段式考虑车—桥体系地震相互作用的简化抗震计算方法。

The results of computations show that the structure of unsteady flow is complex during both the acceleration phase and the constant velocity phase.

计算结果表明启动过程绕大攻角翼型的加速流动结构复杂，该瞬态过程的流动分离现象也明显区别于稳态过程自生和自维持的分离流动，并且启动加速度大小对流动的分离、漩涡结构和强度等都有直接影响。

Firstly, radial horizontal component and transverse horizontal component are derived from tri-channel seismic data at the surface and the bedrock in borehole array by back-azimuth decomposition method, and the histories of radial and vertical components are divided into two parts by Sg wave arrived time. Moreover, it is supposed that transverse horizontal components are made up of SH wave, while vertical component and radial horizontal component are constituted by P-SV wave system.

针对钻井台阵的两处三分量加速度记录，根据反向方位角将两水平分量分解为径向水平分量和横向水平分量，假设横向水平分量由SH波系组成，竖向分量和径向分水平量由P-SV波系组成。

Vehicle side slip angle is considered as mapping of time series of yaw rate and lateral acceleration. A uniform design project is used to select training samples, and the relationship of the three state parameters is established through neural network.

把汽车侧偏角看作横摆角速度和侧向加速度时间序列的映射，采用均匀设计方案对训练样本进行优选，通过神经网络建立三者之间的映射关系。

Lastly, in accordance with the actual situations of the prototype structure of mosque pagoda, based on the similar relation of model experiments, a model structure of mosque pagoda with a similar coefficient of 1/10 is designed and fabricated. Earthquake simulating shaking table tests are performed on the model structure of pagoda in the cases the AB type passive control system with SMA dampers is erected or unerected. The leading earthquake responses like the relative drift at the top of the main tower and the small tower, interstory drift ratio, acceleration, and cracking process of the pagodas body etc. are studied. The operational behaviors involving the deformation capacity and energy dissipation capacity is tested for passive control system with SMA dampers under the earthquake excitation, and the corresponding control mechanism and regularity is also analyzed. Furthermore, the performance changes and protection effectiveness is comprehensively evaluated while the model structure of pagoda is seismically protected or not.

最后，根据光塔原型结构的实际情况，以模型试验的相似关系为基础，设计并制作了一个相似系数S，为1/10的光塔模型结构，并先后进行了未安装和安装A、B型SMA阻尼器被动控制系统光塔模型结构的地震模拟振动台试验，研究了模型结构在3种不同工况下，主塔顶部和小塔顶部的相对位移、层间位移角和加速度以及塔体开裂等光塔结构的主要地震反应，测试了SMA阻尼器被动控制系统在地震激励下的变形能力和消能能力等工作性能，分析了相应的控制机理和控制规律，并从总体上评价了光塔模型结构抗震保护前后的性能变化和保护效果。

Comparative analysis of mechanism of four-levered slay blowing for air-jet looms ZA200 regarding acceleration, minimum transit angle, wefting condition and open motion of short traverse slay blowing and typical slay blowing.

分析了ZA200系列喷气织机的四连杆打纬机构，对短动程打纬机构和标准动程打纬机构的加速度、最小传动角、允许纬纱飞行条件和开口量等方面进行了比较。

To more briefly calculate the accurate solution of the hangingpoint motion parameters of the beampumping unit,the walking beam's swing equation according to the geometry relationship and movement characteristic of the four pitmen mechanism in the beampumping unit is found.

根据游梁式抽油机四连杆机构的几何关系和运动特点，建立了游梁的摆动方程，并由该方程得出了游梁摆角变化规律以及悬点运动的位移、速度和加速度的计算公式，从而给出了求游梁式抽油机悬点运动参数精确解的一种计算方法。

Theory analysis showed that the method of two-position alignment increases the observability degree of state variables, especially for the error of accelerometer and azimuth misalignment.

理论分析结果表明，两位置对准可以提高系统状态变量的可观测度，尤其对加速度计误差和方位失准角的可观测度提高作用明显。

In order to solve the problem, in this dissertation, a new IA technology based on wavelet-filtering and two-position alignment is proposed. The useful signals of sensors are gained by wavelet filtering; the error angles, constant drifts of FOGs and biases of accelerometers are computed through signals at two positions.

对此，本文提出了一种基于小波滤波方法和二位置对准方法相结合的初始对准技术，采用小波滤波方法提取传感器的有用信号，利用两次转位的信号解算初始对准的误差角、陀螺的常值漂移和加速度计的零偏。

Using the dynamic simulation software ADAMS to analyze the six-bar mechanism of shaping machine ;and through the virtual prototype,we get the optimum point from the optimization design of the acceleration and the press angle of shaping machine for the real machine;and we can get an example to the study of virtual prototyping.

简要介绍多体系统动力学的原理及多体系统动力学计算的积分方法，利用动力学仿真软件ADAMS，对牛头刨床的六杆机构进行分析，并通过虚拟样机技术，对牛头刨床加速度和压力角进行了优化设计。为实际的机构设计提供依据，也为虚拟样机技术的学习提供了实例

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。